I have one. I used it quite a bit during COVID. I think 3m’s respirators might flow a little better, and its easier to find their filters. I didn’t have any issues with the seal or comfort on the GVS. And I appreciated the smaller profile. Not sure what the complaints were on rediit, but I like mine.

The GVS Elipse is a lower profile option that should have comparable performance to the 3m respirators. They offer both half and full face respirators as well.